You have to write some scripts...
You could do it like this:
Preinstall script: Move files to backup folder
Installation: It installs the files
Postinstall script: Set permissions, repair permissions
cYa ~Neo

The time calc does not work for me and the indication if the power source is AC or battery.
Thanks for the work tho...
Edit:
Oh, forgot my System specs:
Lenovo 3000 N200 0769-BDG
Intel Core2Duo
GMA X3100
Leopard 10.5.1 (Not EFI)
cYa ~Neo

Hey girls, hey boys!
Just got Leopard roaring...
In my G4 Cube with a flashed NVidia Geforce 6200 Quartz Extreme does not work...
All kexts are loaded (NVDAResman.kext, NVDAN40Hal.kext and Geforce.kext)...
Core Image DOES work properly but not QE...
In Tiger I had QE AND CI.
Any ideas?
cYa ~Neo